/***************************************************************************************************
 * DistanceSRF04.h - Arduino library for retrieving data from the SRF04 Ultrasonic Distance sensor *
 * Copyright 2011-2012 Jeroen Doggen (jeroendoggen@gmail.com)                                      *
 * More info: http://www.robot-electronics.co.uk/files/SRF04.pde                                   *
 ***************************************************************************************************
 * Version History:                                                                                *
 *  Version 0.1: getDistanceCentimeter, blocking                                                   *
 *                                                                                                 *
 * Roadmap:                                                                                        *
 *  Version 0.2: add filtering (low pass filter?)                                                  *
 *  Version 0.3: getDistanceCentimeter, interrupt based                                            *                                                                                          *
 ***************************************************************************************************
 * This library is free software; you can redistribute it and/or                                   *
 * modify it under the terms of the GNU Lesser General Public                                      *
 * License as published by the Free Software Foundation; either                                    *
 * version 2.1 of the License, or (at your option) any later version.                              *
 *                                                                                                 *
 * This library is distributed in the hope that it will be useful,                                 *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of                                  *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU                               *
 * Lesser General Public License for more details.                                                 *
 *                                                                                                 *
 * You should have received a copy of the GNU Lesser General Public                                *
 * License along with this library; if not, write to the Free Software                             *
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA                      *
 **************************************************************************************************/

#ifndef DistanceSRF04_h
#define DistanceSRF04_h

#if defined(ARDUINO) && ARDUINO >= 100
  #include "Arduino.h"
#else
  #include "WProgram.h"
  #include <pins_arduino.h>
#endif

#include <UltrasonicDistanceSensor.h>

class DistanceSRF04 : public UltrasonicDistanceSensor
{
	public:
		DistanceSRF04();
		int getDistanceTime();

	private:
		long _duration;
};
#endif
